Siloxane oil phase separation equipment

Abstract

The utility model provides siloxane oil phase separation equipment. The raw material hydrogen chloride for synthesizing methyl chloride in the organic silicon industry is mixed with siloxane generated by dimethyl hydrolysis, the operation of the device is influenced by the gathering of siloxane in the pipeline and equipment of the methyl chloride synthesis device, and the separation of siloxane and water phase is realized by adding the liquid separation tank and the collecting tank, so that the siloxane is prevented from being brought into a subsequent treatment system. Wherein most siloxane enriched in the washing tower is primarily separated in the liquid separation tank and is discharged into the collecting tank through pressure from an oil discharge port in the side surface of the liquid separation tank for further standing and separation, and a water phase in the collecting tank is returned to the system through a pump.

Description

Technical Field

[0001] The utility model belongs to the field of chemical industry and relates to siloxane oil phase separation equipment in a chloromethane synthesis device. Background Art

[0002] In the silicone industry, methyl chloride is usually prepared by the reaction of hydrogen chloride and methanol, where the raw material hydrogen chloride is obtained by hydrolysis of dimethyldichlorosilane, and siloxane is a by-product of the hydrolysis reaction.

[0003] Due to its polycondensation and adhesive properties, siloxanes easily polymerize into large polysiloxane molecules in chloromethane synthesis equipment, clinging to pipe walls, heat exchanger holes, and other locations. This not only affects product purity but can also cause equipment blockage and reduced operating efficiency. Summary of the Invention

[0004] The utility model provides a siloxane oil phase separation device in a chloromethane synthesis process, which aims to effectively separate the siloxane oil phase in a liquid phase and prevent the siloxane from entering a subsequent system.

[0005] The purpose of the utility model is achieved through the following solutions:

[0006] A siloxane oil phase separation device, wherein the bottom of a washing tower is connected to the inlet of a separator tank through a pipeline; the outlet of the separator tank is connected to the pipeline at the top of a collecting tank through a pipeline; and the bottom of the collecting tank is connected to the other inlet end of the separator tank through a circulation pump.

[0007] Both the separation tank and the collection tank are equipped with liquid level gauges and interface gauges to reflect the liquid levels of the oil phase and water phase in the tank.

[0008] The connecting pipes from the washing tower and the collecting tank to the liquid separation tank are all bottom pipes.

[0009] A plurality of drainage pipes are provided in the liquid separation tank. The plurality of drainage pipes are distributed in a gradient height distribution from bottom to top in the liquid separation tank, and the extension lengths of the plurality of drainage pipes in the liquid separation tank are distributed in a gradient shortening manner from bottom to top.

[0010] In the preferred embodiment, four drainage ports with height gradients are provided on the side of the liquid separation tank to accommodate different oil discharge levels, and observation windows are provided on the four drainage port pipes to observe the oil-water separation effect.

[0011] The drainage pipes are connected to the pipes on the top of the collecting tank after being collected outside the liquid separation tank, and observation windows are provided on the drainage pipes.

[0012] The gas phase pipe at the top of the separator tank is connected to the washing tower, and the oil is discharged by the pressure of the washing tower.

[0013] The collection tank is equipped with process water and nitrogen pipelines. The process water pipeline is used to add water to accelerate oil-water separation, cleaning, and oil drainage. The collection tank is equipped with a 3 kg nitrogen pipeline to increase nitrogen pressure during oil drainage.

[0014] A steam heating jacket is installed outside the collection tank, which uses 5 kg of steam for heating and insulation to prevent the temperature from being too low during static stratification, causing the siloxane to aggregate and form gels, making it impossible to discharge it later.

[0015] During operation, the bottom liquid of the washing tower is discharged into the separator tank for initial separation. The oil phase is located in the upper layer. After it is enriched to a certain oil layer, the oil phase is pressed into the collection tank by pressure through the corresponding oil discharge port. It is further allowed to stand and stratify in the collection tank. The water phase at the bottom is returned to the separator tank through the pump, and the oil phase is discharged from the external discharge pipe to the ton barrel by pressure.

[0016] The separation tank and collection tank are made of enameled equipment to increase the corrosion resistance of the equipment and reduce the adhesion of siloxane to the tank wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the equipment structure diagram of the utility model, which includes a washing tower 1, a liquid separation tank 2, a collecting tank 3, a drain pipe 4, a circulating pump 5, a process water pipe 6, and a nitrogen pipe 7. DETAILED DESCRIPTION

[0018] The present invention will be further described by the following specific embodiments:

[0019] A siloxane oil phase separation device, wherein the bottom of a washing tower 1 is connected to the inlet of a separatory tank 2 through a pipeline; the outlet of the separatory tank 2 is connected to the pipeline at the top of a collecting tank 3 through a pipeline; and the bottom of the collecting tank 3 is connected to the other inlet end of the separatory tank 2 through a pipeline.

[0020] Both the separation tank and the collection tank are equipped with liquid level gauges and interface gauges to reflect the liquid levels of the oil phase and water phase in the tank.

[0021] The connection pipe openings of the washing tower 1 and the collecting tank 3 to the liquid separation tank 2 are all bottom pipes.

[0022] Four drainage pipes 4 are provided in the separation tank 2. The four drainage pipes 4 are distributed in a gradient height from bottom to top in the separation tank 2. The lengths of the four drainage pipes 4 extending into the separation tank 2 are distributed in a gradient shortening manner from bottom to top.

[0023] The drainage pipes are connected to the pipes on the top of the collecting tank 3 after being collected outside the liquid separator 2. The drainage pipes are all provided with observation windows.

[0024] The gas phase pipeline at the top of the separator tank 2 is connected to the washing tower 1, and the oil is discharged by the pressure of the washing tower.

[0025] The collecting tank 3 is provided with a process water pipeline 6 and a nitrogen pipeline 7. The collecting tank 3 is provided with a steam heating jacket outside.

[0026] like Figure 1 As described above, the liquid separator receives the liquid from the bottom of the washing tower for initial separation, then enters the collection tank through the oil drain port for a second static separation, and finally the siloxane is discharged through nitrogen. The separator and collection tank are equipped with a liquid level gauge and an interface gauge. The liquid level gauge and interface gauge can reflect the liquid levels of the oil and water phases in the tank. When the interface gauge reaches the corresponding oil drain port height, the oil drain port can be opened to drain the oil. An observation window is installed on the oil drain port pipe to observe the oil-water separation effect and judge the accuracy of the interface gauge measurement. After long-term operation of the system, the oil phase accumulated in the bottom of the tower or tank can be discharged to the collection tank for disposal. The collection tank has a steam heating jacket that uses 5 kg of steam. The static separation process in the collection tank takes a long time, and the discharge of the oil phase is intermittent. Heating and heat preservation with 5 kg of steam can prevent the aggregation and gelation of siloxane at low temperatures.

Claims

1. A siloxane oil phase separation device, characterized in that, The bottom of the washing tower (1) is connected to the inlet of the separation tank (2) through a pipeline; the outlet of the separation tank (2) is connected to the pipeline at the top of the collection tank (3) through a pipeline; and the bottom of the collection tank (3) is connected to the other inlet end of the separation tank (2) through a circulation pump (5).

2. The siloxane oil phase separation equipment according to claim 1, characterized in that The liquid separation tank (2) and the collecting tank (3) are both equipped with a liquid level meter and an interface level meter to reflect the liquid levels of the oil phase and the water phase in the tank.

3. The siloxane oil phase separation equipment according to claim 1, characterized in that The connection pipe openings of the washing tower (1) and the collecting tank (3) to the liquid separation tank (2) are all bottom-inserted pipes.

4. The siloxane oil phase separation equipment according to claim 1, characterized in that A plurality of liquid discharge pipes (4) are provided in the liquid separation tank (2), the plurality of liquid discharge pipes (4) are distributed in a gradient height distribution from bottom to top in the liquid separation tank (2), and the lengths of the plurality of liquid discharge pipes extending into the liquid separation tank (2) are distributed in a gradient shortening manner from bottom to top.

5. The siloxane oil phase separation equipment according to claim 4, characterized in that The drainage pipes are connected to the pipes on the top of the collecting tank (3) after being collected outside the liquid separation tank (2), and observation windows are provided on the drainage pipes.

6. The siloxane oil phase separation equipment according to claim 1, characterized in that The gas phase pipeline at the top of the separator tank (2) is connected to the washing tower (1), and the oil is discharged by the pressure of the washing tower.

7. The siloxane oil phase separation equipment according to claim 1, characterized in that A process water pipeline (6) and a nitrogen pipeline (7) are provided on the collecting tank (3).

8. The siloxane oil phase separation equipment according to claim 1, characterized in that A steam heating jacket is provided outside the collecting tank (3).

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